JMultiComparable.cc

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#include <iostream>
#include <iomanip>
#include <vector>
#include <set>
#include <algorithm>

#include "JLang/JComparable.hh"
#include "JLang/JMultiComparable.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


namespace {

  using namespace JPP;
  

  struct __A__ :
    public JComparable<__A__>
  {
    __A__() :
      value(0)
    {}

    bool less(const __A__& object) const
    {
      return this->value < object.value;
    }

    friend std::istream& operator>>(std::istream& in, __A__& object)
    {
      return in >> object.value;
    }

    friend std::ostream& operator<<(std::ostream& out, const __A__& object)
    {
      return out << object.value;
    }
    
    int value;
  };
  

  struct __B__ :
    public JComparable<__B__>
  {
    __B__() :
      value(0)
    {}

    bool less(const __B__& object) const
    {
      return this->value < object.value;
    }

    friend std::istream& operator>>(std::istream& in, __B__& object)
    {
      return in >> object.value;
    }

    friend std::ostream& operator<<(std::ostream& out, const __B__& object)
    {
      return out << object.value;
    }
    
    int value;
  };


  struct __C__ :
    public __A__,
    public __B__,
    public JMultiComparable<__C__, JTYPELIST<__A__, __B__>::typelist>
  {
    __C__() 
    {}

    friend std::istream& operator>>(std::istream& in, __C__& object)
    {
      return in >> static_cast<__A__&>(object) 
                >> static_cast<__B__&>(object);
    }

    friend std::ostream& operator<<(std::ostream& out, const __C__& object)
    {
      return out << static_cast<const __A__&>(object) << ' '
                 << static_cast<const __B__&>(object);
    }    
  };
}

/**
 * \file
 *
 * Example program to test JLANG::JComparible class.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;

  typedef vector<__C__> buffer_type;
  
  buffer_type buffer;
  int         debug;

  try {

    JParser<> zap("Example program to test hierarchical comparisons of objects.");

    zap['i'] = make_field(buffer);
    zap['d'] = make_field(debug)     = 0;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }

  DEBUG("before:" << endl);
  for (buffer_type::const_iterator i = buffer.begin(); i != buffer.end(); ++i) {
    DEBUG(*i << endl);
  }
    
  sort(buffer.begin(), buffer.end());
  
  DEBUG("after:" << endl);
  for (buffer_type::const_iterator i = buffer.begin(); i != buffer.end(); ++i) {
    DEBUG(*i << endl);
  }

  ASSERT(buffer.size() > 1);
  
  for (buffer_type::const_iterator q = buffer.begin(), p = q++; q != buffer.end(); ++p, ++q) {
    ASSERT((static_cast<const __A__&>(*p) <  static_cast<const __A__&>(*q))    ||
           (static_cast<const __A__&>(*p) == static_cast<const __A__&>(*q) &&
            static_cast<const __B__&>(*p) <  static_cast<const __B__&>(*q)));
  }
}